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  • O'Kane Lisa, Groher Michael. Oropharyngeal dysphagia in patients with chronic obstructive pulmonary disease: a systematic review.   [].   [  2014    02] ;  11( 3 ): 449-506. : http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-18462009000300019&lng=e.  21--2009.  http://dx.doi.org/10.1590/S1516-18462009005000040.